User's Manual
Table Of Contents
- 1: Purpose
- 2: Scope
- 3: VAM-CM Overview
- 4: VAM-CM interfaces
- 4.1: Absolute maximum ratings
- 4.2: VAM Control interface description
- 4.2.1: System USB description
- 4.2.2: USIM interface description
- 4.2.3: VAM control UART interface description
- 4.2.4: Analog Audio interface description
- 4.2.5: Digital Audio interface description
- 4.2.6: Power Supply interface description
- 4.2.7: External VRTC Supply Functionality
- 4.2.8: Control and ID interface description
- 4.3: Radio interface description
- 4.4: VAM-CM Power Management Handling
- 4.5: Mechanical interface
- 4.6: Environmental conditions
- 5: Evaluation tools
DRAFT
5: Evaluation tools
Pin Control Description
#18 VAM_
MODEM_
OK
Modem OK
#19 Modem
RST
Warm reset for VAM-CM
"LOW" Warm reset for VAM-CM
"HIGH" (Float) no action
#20 TTA Not
OK
Modem has no GPS location or channel assignment
#21 VAM-
CMSleep
Indicates VAM-CM sleep mode status
“HIGH” – Modem Active
“LOW” – Modem Sleep
#22 SIM_V SIM supply voltage output
#23 VAM_
BOOT_1
Control interface selection (UART/USB) during power-up
"HIGH" (Float) UART control mode (default)
"LOW" USB control mode
#24 SIM_RST SIM Reset output
#25 VAM_
BOOT_2
Reserved for future use
#26 SIM_CLK SIM Clock output
#27 VAM_
BOOT_3
Reserved for future use
#28 SIM_IO SIM IO interface
#29 TX_
DISABLE
Disables VAM-CM transmitter operation
"HIGH" Transmission enabled in VAM-CM (default)
"LOW" Transmission disabled in VAM-CM
#30 CARD_
DETECT
SIM card inserted input
Table 19. VAM Control interface signals
Figure 20. VAM control interface pin organization
28:GSPS Core Module 2.0 VAM-CM HW Description
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